if individual states manage to secede and enforce a government based on the currently ignored US constitution, and get rid of jack booted thug type police forces, they will have to put up fences around their borders to keep from being stampeded in the rush to live there by people from other states.

the problem is that the only states that stay in are the ones who have people that want to be spoon fed and the price of real estate in those states would plummet, so no way to unload property in the socialist states to get a stake in the states that secede where the opposite would happen and property prices would rise.